{"instruction": "You are an expert in relationship extraction. Please extract relationship triples that match the schema definition from the input. Return an empty list for relationships that do not exist. Please respond in the format of a JSON string.", "schema": ["hyponym of", "evaluate for", "compare", "used for"], "input": "Finally , we provide an explicit characterization of the polytope of concavity in terms of the cycle structure of the region graph ."}
{"hyponym of": [], "evaluate for": [], "compare": [], "used for": []}